Ad hoc is a Latin phrase meaning "for this". In English, it generally signifies a solution designed for a specific problem or task, non-generalizable, and not intended to be able to be adapted to other purposes (compare with a priori).
Common examples are ad hoc organizations, committees, and commissions created at the national or international level for a specific task. In other fields, the term could refer, for example, to a military unit created under special circumstances, a tailor-made suit, a handcrafted network protocol (e.g. ad hoc network), a temporary banding together of geographically-linked franchise locations (of a given national brand) to issue advertising coupons, or a purpose-specific equation.
Ad hoc can also mean makeshift solutions, shifting contexts to create new meanings, inadequate planning, or improvised events.
In science and philosophy, ad hoc means the addition of extraneous hypotheses to a theory to save it from being falsified. Ad hoc hypotheses compensate for anomalies not anticipated by the theory in its unmodified form.
Scientists are often skeptical of scientific theories that rely on frequent, unsupported adjustments to sustain them. Ad hoc hypotheses are often characteristic of pseudo-scientific subjects such as homeopathy.
In the military
In the military, ad hoc units are created during unpredictable situations, when the cooperation between different units is suddenly needed for fast action.
The term ad hoc networking typically refers to a system of network elements that combine to form a network requiring little or no planning.
- Ad hoc testing
- Ad infinitum
- Ad libitum
- House rule
- Russell's teapot
- Inductive reasoning
- Confirmation bias
- Cherry picking
- "When to italicize foreign words and phrases". Grammarpartyblog.com. 2012-02-23. Retrieved 2016-01-06.
- "Italics". The Economist. Retrieved 2016-01-06.
- Carroll, Robert T. (2012-02-23), "Ad hoc hypothesis", The Skeptic's Dictionary, John Wiley & Sons, retrieved 2013-05-27
- Howard, R. (2002), Smart Mobs: the Next Social Revolution, Perseus
- The dictionary definition of ad hoc at Wiktionary